<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" > 添加角色</el-button> 
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="roleList" border="" stripe="">
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['center','bdbottom',i1===0?'bdtop':'']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable="" @close="removeRightById(scope.row, item1.id)"
                                >{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>                              
                            </el-col>
                            <!-- 渲染二级、三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="['center']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6" :class="[i2 === 0 ? '' : 'bdtop']">
                                        <el-tag type="success" closable="" 
                                        @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>         
                                    </el-col>
                                    <el-col :span="18" :class="[i2 === 0 ? '' : 'bdtop']">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" 
                                        :key="item3.id" closable="" @close="removeRightById(scope.row, item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>{{scope.row}}</pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting"
                        @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog
        title="分配权限" :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClose">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
            default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="setAllowRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //所有角色的列表数据
            roleList: [],
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            //所有权限的数据
            rightslist: [],
            //树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            //默认选中的节点id值数组
            defKeys: [],
            //即将分配权限的角色id
            roleId: '',
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        //获取所有角色的列表
        async getRolesList(){
            const {data: res} = await this.$http.get('roles')

            if(res.meta.status!==200){
                return this.$message.error('获取角色列表失败')
            }

            this.roleList=res.data
            console.log(this.roleList)
        },
        //根据id删除对应的权限
        async removeRightById(role,rightId){
            //弹框提示是否确认
            const confirmResult = await
            this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).catch(err => err)

          if(confirmResult !== 'confirm'){
              return this.$message.info('取消了删除')
          }
          
          const { data : res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
          //const { data : res } = await this.$http.delete('roles/30/rights/116')
         
          if(res.meta.status!==200){
              console.log(res.meta.status)
              return this.$message.error('删除权限失败！')
          }

         // this.getRolesList()        
         role.children = res.data
        },
        //展示分配权限胡对话框
        async showSetRightDialog(role){  
            this.roleId= role.id          
            //获取所有权限胡数据
            const {data : res } = await
            this.$http.get('rights/tree')

            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败')
            }

            //把获取到的数据权限保存到data中
            this.rightslist = res.data
            console.log(this.rightslist)

            //获取三级节点得id
            this.getLeafKeys(role, this.defKeys)
            

            this.setRightDialogVisible = true
        },
        //通过递归形式，获取角色下所有三级权限得id，并保存到defKeys数组中
        getLeafKeys(node, arr){
            //如果不包含children则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            
            node.children.forEach(item =>        
            this.getLeafKeys(item, arr))
        },
        //监听分配权限对话框得关闭
        setRightDialogClose(){
            this.defKeys = []
        },
        //角色权限分配确认
        async setAllowRights(){
            const keys = [ 
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()                      
            ]

            const idStr = keys.join(',')

            const {data : res} = await
            this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})

            if(res.meta.status !== 200){
                console.log(res)
                return this.$message.error('分配权限失败!')
            }

            this.$message.success('分配权限列表成功!')
            this.getRolesList()
            this.setRightDialogVisible = false

        },

    }
        
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 10px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.center{
    display: flex;
    align-items: center;
}

</style>